What is the integral of 3(200+x)^2 ?

The integral of 3(200+x)^2 is 120000x+600x^2+x^3+C

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integral of 3(200+x)^2

\int 3 (200 + x)^{2} d x

120000 x + 600 x^{2} + x^{3} + C

Solution steps

\int 3 (200 + x)^{2} d x

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 3 \cdot \int (200 + x)^{2} d x

Expand

(200 + x)^{2} : 40000 + 400 x + x^{2}

= 3 \cdot \int 40000 + 400 x + x^{2} d x

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= 3 (\int 40000 d x + \int 400 x d x + \int x^{2} d x)

\int 40000 d x = 40000 x

\int 400 x d x = 200 x^{2}

\int x^{2} d x = \frac{x ^{3}}{3}

= 3 (40000 x + 200 x^{2} + \frac{x ^{3}}{3})

Simplify

3 (40000 x + 200 x^{2} + \frac{x ^{3}}{3}) : 120000 x + 600 x^{2} + x^{3}

= 120000 x + 600 x^{2} + x^{3}

Add a constant to the solution

= 120000 x + 600 x^{2} + x^{3} + C

What is the integral of 3(200+x)^2 ?
The integral of 3(200+x)^2 is 120000x+600x^2+x^3+C